Here's the first Audi R8 in a U.S. racing seriesMike Spinelli12/06/11 1:30pmFiled to: Audi R8MotorsportsRolex Grand-Am SeriesAudi52EditPromoteShare to KinjaToggle Conversation toolsGo to permalinkAPR Motorsport has already committed to racing the Audi R8 LMS in the 2012 Rolex Grand Am series. But this is the first actual photo of the Grand Am prepped car, on track at today's test session at Daytona.AdvertisementSo whose car is this? It's not a team car. It's a prototype from Audi Sport with Frank Stippler behind the wheel. It's a tester for Audi's latest generation of customer racecars. Folks on the scene say it ran a 1:56.491 this morning, or about six-seconds off pace.The Audi will join the typical Grand Am GT field of Porsche 911s and a new cadre of Ferrari 458s for the 2012 season. The first shot of the Grand-Am-prepped R8 hit earlier today at courtesy of QuattroWorld.